Water Quality Report · Updated October 07, 2026
NORTH ALAMO WSC
NORTH ALAMO WSC delivers tap water graded F (50/100) by TapWaterSafety.org. The utility serves approximately 171,195 residents in EDINBURG, Texas using surface water. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Bromochloroacetic acid significantly above health guideline; Arsenic significantly above health guideline. For questions, the utility can be reached at 956-383-1618.
Is EDINBURG tap water safe to drink?
NORTH ALAMO WSC delivers tap water that earns a grade of F (50/100) from TapWaterSafety.org — a poor rating, with significant contamination concerns and/or recent violations.
The utility serves 171,195 residents in EDINBURG, drawing from surface water.
Public testing data identifies 17 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Bromochloroacetic acid, Arsenic, Dibromoacetic acid, Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Bromodichloromethane, Perfluorohexane sulfonate (PFHXS), Dibromochloromethane, Dichloroacetic acid, Bromoform, Trichloroacetic acid, Chloroform, Chlorite, Uranium, Nitrate, Chromium (hexavalent). For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for NORTH ALAMO WSC (system ID TX1080029) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Lead and Copper Rule | Missed testing or reporting | 03/31/2024 | Resolved |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Contaminant above the legal limit | 07/01/2025 | Resolved |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 09/26/2023 | Resolved |
| Consumer Confidence Rule | Other (e.g. public notice) | 07/01/2025 | Resolved |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for EDINBURG residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for NORTH ALAMO WSC.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 27.1 ppb, 452x above the EWG health guideline of 0.06 ppb.
Bromochloroacetic acid significantly above health guideline
Moderate concernBromochloroacetic acid detected at 8.29 ppb, 415x above the EWG health guideline of 0.02 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.29 ppb, 324x above the EWG health guideline of 0.004 ppb.
Contact NORTH ALAMO WSC
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for EDINBURG
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 50/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
27.1 ppb | 0.06 | — | — | — | — | — | 452× over |
| Bromochloroacetic acid Disinfection byproduct |
8.29 ppb | 0.02 | — | — | — | — | — | 415× over |
| Arsenic Heavy metal |
1.29 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 324× over |
| Dibromoacetic acid Disinfection byproduct |
8.14 ppb | 0.03 | — | — | — | — | — | 271× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
38.6 ppb | 0.15 | 80.0 | 100 | — | — | — | 258× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
19.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 191× over |
| Bromodichloromethane Disinfection byproduct |
8.79 ppb | 0.06 | — | — | — | — | — | 146× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.131 ppt | 0.001 | 10.0 | — | — | — | — | 131× over |
| Dibromochloromethane Disinfection byproduct |
11.6 ppb | 0.1 | — | — | — | — | — | 116× over |
| Dichloroacetic acid Disinfection byproduct |
8.35 ppb | 0.2 | — | — | — | — | — | 42× over |
| Bromoform Disinfection byproduct |
11.5 ppb | 0.5 | — | — | — | — | — | 23× over |
| Trichloroacetic acid Disinfection byproduct |
1.53 ppb | 0.1 | — | — | — | — | — | 15× over |
| Chloroform Disinfection byproduct |
4.18 ppb | 0.4 | — | — | — | — | — | 10× over |
| Chlorite Disinfection byproduct |
280.0 ppb | 50.0 | 1000.0 | — | — | — | — | 5.6× over |
| Uranium Radiological |
0.72 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 1.7× over |
| Nitrate Inorganic |
0.196 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.4× over |
| Chromium (hexavalent) Heavy metal |
0.0277 ppb | 0.02 | — | — | — | — | — | 1.4× over |
| Chlorate Disinfection byproduct |
106.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
4.42 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
5.45 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
84.1 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Aluminum Heavy metal |
47.4 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Selenium Heavy metal |
2.0 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Antimony Heavy metal |
0.0632 ppb | 1.0 | 6.0 | 10 | 20 | 1 | — | Below guideline |
| Atrazine Pesticide/Herbicide |
0.00407 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Below guideline |
| Manganese Heavy metal |
3.86 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.929 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
3.54 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.123 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Cobalt Other |
0.0735 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
1.19 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.281 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.258 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.115 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| 1-Butanol Other |
0.312 ppb | — | — | — | — | — | — | Below guideline |
| Cyanide Inorganic |
28.2 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Fluoride Inorganic |
0.462 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Hexadecanoic acid Other |
13.7 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
38.2 ppb | — | — | — | — | — | — | Below guideline |
| Octadecanoic acid Other |
21.6 ppb | — | — | — | — | — | — | Below guideline |
| Tetradecanoic acid Other |
6.02 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
NORTH ALAMO WSC service area
This water system serves 1 community in Hidalgo County, Texas. Click any city for its dedicated tap water quality page.
Find the right filter for EDINBURG water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.